Electronic-Insulating Coating of CaCO3 on TiO2 Electrode in Dye-Sensitized Solar Cells: Improvement of Electron Lifetime and Efficiency
Electronic-Insulating Coating of CaCO3 on TiO2 Electrode in Dye-Sensitized Solar Cells: Improvement of Electron Lifetime and Efficiency
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DOI：
10.1021/cm0603102
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发表时间：
2006-05
影响因子：
8.6
通讯作者：
Zhong‐Sheng Wang;M. Yanagida;K. Sayama;H. Sugihara
中科院分区：
文献类型：
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作者：
Zhong‐Sheng Wang;M. Yanagida;K. Sayama;H. Sugihara
在纳米TiO 2电极表面包覆CaCO 3电子绝缘层，可显著提高电池的短路光电流（Jsc）和开路光电压（Voc）。Jsc的显着增加主要是由于显着增加的染料吸附导致的CaCO 3比TiO 2更基本的表面，而Voc的增加源于抑制电荷复合由于TiO 2的表面覆盖的绝缘涂层的CaCO 3，揭示了强度调制光电压谱。用N719敏化的15 μm TiO 2（23 nm）纳米晶电极，用1wt%CaCO3涂覆，在电池表面上使用抗反射膜，产生10.2%的功率转换效率，其中N719是顺式-二（硫氰基）-双（2，2 '-联吡啶-4，4'-二羧酸）钌（II）。
Electronic-insulating coating of CaCO3 on nanocrystalline TiO2 electrode for dye-sensitized solar cells was found to increase both short-circuit photocurrent (Jsc) and open-circuit photovoltage (Voc) remarkably. The significant increase in Jsc is mainly attributed to the remarkably increased dye adsorption resulting from the more basic surface of CaCO3 than TiO2, while the increase in Voc originates from suppression of charge recombination owing to the surface covering of TiO2 with an insulating coating of CaCO3, revealed by intensity-modulated photovoltage spectroscopy. A 15 μm TiO2 (23 nm) nanocrystalline electrode coated with 1 wt % CaCO3, sensitized with N719, produced power conversion efficiency of 10.2%, where N719 is cis-di(thiocyanato)-bis(2,2‘-bipyridyl-4,4‘-dicarboxylate) ruthenium(II), using an antireflective film on the cell surface.